Head-to-head · 12 bouts
Hachiya Toshiyuki and Kotogatake Koichi have met 12 times in recorded sumo. Kotogatake Koichi leads 7–5.
Hachiya Toshiyuki has won with: frontal lift out (2), outside leg trip (1), twisting backward knee trip (1), underarm throw (1).
Kotogatake Koichi has won with: frontal force out (3), over arm throw (2), frontal lift out (1), arm lock throw (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 1976 | Day 7 | Kotogatake Koichi | Over arm throw | Juryo 3 East vs Juryo 12 East |
| November 1976 | Day 4 | Kotogatake Koichi | Frontal force out | Juryo 2 East vs Juryo 7 West |
| September 1977 | Day 15 | Kotogatake Koichi | Frontal lift out | Juryo 4 East vs Juryo 2 West |
| November 1977 | Day 1 | Kotogatake Koichi | Frontal force out | Juryo 12 East vs Juryo 9 West |
| January 1978 | Day 3 | Kotogatake Koichi | Arm lock throw | Juryo 4 East vs Juryo 9 West |
| March 1979 | Day 11 | Hachiya Toshiyuki | Frontal lift out | Juryo 6 East vs Juryo 12 West |
| May 1979 | Day 3 | Kotogatake Koichi | Over arm throw | Juryo 10 East vs Juryo 12 West |
| July 1979 | Day 12 | Hachiya Toshiyuki | Outside leg trip | Juryo 10 East vs Juryo 6 West |
| May 1980 | Day 5 | Hachiya Toshiyuki | Twisting backward knee trip | Juryo 13 East vs Makushita 3 East |
| January 1982 | Day 15 | Hachiya Toshiyuki | Underarm throw | Juryo 4 East vs Juryo 11 West |
| November 1982 | Day 7 | Kotogatake Koichi | Frontal force out | Juryo 8 East vs Juryo 7 West |
| March 1983 | Day 2 | Hachiya Toshiyuki | Frontal lift out | Juryo 13 West vs Juryo 8 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.